Derwin H. Bell

AT American Telephone And Telegraph: 1 patents #132 of 699Top 20%

📍 Philadelphia, PA: #2,553 of 4,834 inventorsTop 55%

🗺 Pennsylvania: #43,221 of 74,527 inventorsTop 60%

Overall (All Time): #3,963,973 of 4,157,543Top 100%

Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4788697	Method and apparatus for synchronizing a signal to a time base	Chauncey Herring, Jr., Jose M. Miranda	1988-11-29